Does Distance Matter Less Now? The Changing Role of Geography in Biotechnology Innovation

被引：14

作者：

Johnson, Daniel K. N. ^{[1
,2
]}

Lybecker, Kristina M. ^{[1
]}

机构：

[1] Colorado Coll, Dept Econ, Colorado Springs, CO 80903 USA

[2] Colorado Coll, Innovat Minds Program, Colorado Springs, CO 80903 USA

来源：

REVIEW OF INDUSTRIAL ORGANIZATION | 2012年 / 40卷 / 01期

基金：

美国国家科学基金会;

关键词：

Biotechnology; Citation; Distance; Patent; Spillover; KNOWLEDGE SPILLOVERS; PATENT CITATIONS; LOCALIZATION; INFORMATION; IMPACT;

D O I：

10.1007/s11151-011-9316-6

中图分类号：

F [经济];

学科分类号：

02 ;

摘要：

Using patent citation data for the U.S., we test whether knowledge spillovers in biotechnology are sensitive to distance, and whether that sensitivity has changed over time. Controlling for self-citation by inventor, assignee, and examiner, cohort-based regression analysis shows that physical distance is becoming less important for spillovers with time.

引用

页码：21 / 35

页数：15

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